13678003621 has 2 divisors, whose sum is σ = 13678003622. Its totient is φ = 13678003620.

The previous prime is 13678003589. The next prime is 13678003627. The reversal of 13678003621 is 12630087631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10793132100 + 2884871521 = 103890^2 + 53711^2 .

It is a cyclic number.

It is not a de Polignac number, because 13678003621 - 2⁵ = 13678003589 is a prime.

It is a super-2 number, since 2×13678003621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13678003627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6839001810 + 6839001811.

It is an arithmetic number, because the mean of its divisors is an integer number (6839001811).

Almost surely, 2^13678003621 is an apocalyptic number.

It is an amenable number.

13678003621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13678003621 is an equidigital number, since it uses as much as digits as its factorization.

13678003621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 13678003621 in words is "thirteen billion, six hundred seventy-eight million, three thousand, six hundred twenty-one".